[Pentegarn]

I got a list of must plays for you then

Thunderstone- A deck building game where you have to compete with other players to build a deck capable of gaining the most victory points

Ascension- In some ways similar to Thunderstone, but streamlined to a mere 3 game mechanics

Nightfall- While I hate it's theme, I love the everyone plays on everyone's turn mechanic

Dominion- Probably my least favorite on the list, but its popularity is a lumbering juggernaut, so you will likely never want for more players to play it

Quarriors!- Not a deck/card game, but similar in its mechanic, you buy dice that represent creatures and spells to get enough points to win the game, lots of fun there